What should I be doing now (Time to Move on?)

[Coconut]

So my in-laws want to meet up on my birthday for lunch or dinner. I've always been very close to them, and consider them friends. I've met up with them twice since my WW and I have S, and they mean a lot to me and we always have a good time when we get together.

I don't have anything to do with WW anymore, I communicate directly with my step son and although we work together, I only see her maybe once every two weeks. I am separating my life from hers and doing so feels right.

I want to see my in-laws for my birthday, I enjoy spending time with them and want to, but it just seems wrong, although I don't know why. I'm questioning going to see them, I'm questioning if I should just take this birthday away from them and see what next year brings. I don't know, I just don't know.

I've already accepted their invite, I've already agreed to meet with them, but I still have this nagging feeling that I'm not sure I should go, that things would be better without them being around. We don't talk about her, but she is the piece that binds us, so although unspoken, she's not entirely gone.

What do you think, should I go as I want to, or cancel as my inner self is thinking would be best?